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I have a 454 with a 268 hyd cam in my 4x4 Blazer but it's coming out and going into my 80 Malibu. I'm adding a set of aluminum heads along with a roller cam. Never ran one before and need to know if there is anything different I need for them. I'm putting on a set Comp Pro magnums, new pushrods and the rollers lifters to match the cam. Is there anything that needs to be done to the block, distributor, tining chain, cover or anything else??

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And possibly a bronze tipped fuel pump pushrod...
 

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first you need to determine if the roller cam is cast or steel, if steel, does it have a cast dist gear-as mentioned, depending on what you get wether you need bronze dist gear, bronze tipped fuel pump rod, correct pushrod length,
and you need a cam button to hold the cam from moving back and forth
this goes between cam gear and timing chain cover, and needs to be set up with the correct end play
 
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